FIELD: oil and gas industry.
SUBSTANCE: device contains hydropulsator controlled by computer; hydropulsator acts on wash liquid column inside well strainer, wash liquid return pipeline connected to gap between casing string and tubing. Hydropulsator is installed at wash liquid return pipeline; it can change oscillation amplitude when bypass channel with cock is installed in parallel to hydropulsator.
EFFECT: improving and speeding-up of well strainer cleanout.
2 cl, 1 dwg
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